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Seems like all the articles online that I've read about the "misconception of brake rotor warping" hone in on the premise that you don't have "warping", just uneven wear. Excess runout typically occurs from the pads wearing the rotors unevenly, probably due to an imbalance in the rotor. It's not "warping" like you'd see with a piece of wood, but the essence of it is the same: it's a physical imperfection in the rotor surface, causing the pad to make inconsistent contact with the rotor. Whether you call it a warp or uneven wear, the available solutions are the same: re-surface the rotor, or replace it.
For the record, I don't see anything like "uneven pad deposit" on my rotors. I've researched and seen photos of this and that's not what's going on here. I imagine the solution for that would be to lightly scuff the rotors with some high grit sandpaper or to use something like the drill attachment linked earlier.
Any time the wheels are removed and re-mounted, there's a chance that they'll be remounted unevenly and cause uneven wear. My take-aways here are to tighten down lugs in a star pattern always (or re-do the job correctly after you hand the car to someone else to rotate/balance, etc.), and make sure to get brakes dry after a wash and drive it afterward for a few minutes.
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